There's no point to non-tender an arb-eligible player just to try to re-sign him, that makes no sense whatsoever.
And really, there's no one that has been mentioned in this thread that will bring in any kind of value in a trade. Baker, Nady, Theriot, Gorzelanny and Fontenot are all bad players, and the rest of the teams in the league know that. And I highly doubt there is a serious market for any of these guys. Gorzelanny, maybe, will garner some interest, but the return will still be crap.
For the 351384351th time, it's not as simple as saying "he needs to be traded", other teams understand these guys blow, and any return on any trade (again, I highly doubt the existence of a serious market for most of them) will be nothing but crappy young players or crappy veterans. Nothing is going to happen with this team that makes them markedly better both in the short and long terms.